Sectional heating boiler



Sephl, 1925. 1,551,642

A. G. CRIPPS SECTIONAL HEATING BOILER Filed June 25. 1923 5 Sheets-Sheet 1 INVE/vrOB Sept. 1, 1925.

A. G. CRIPPS SECTTONAL HEATING BOILER Filed June 25, 1923 5 Sheets-Sheet 2 A. G. CRIPPS SECTIONAL HEATING BOILER Sept. 1. 1925.

5. sheets-sheet 5 Filed June 25, 192-3 ,47- Q NE) "Se t; 1, 1925.

' A. G. CRIPPS SECTIONAL HEATING BOILER Filed June 25. 1923 5 Sheets-Sheet 5 Patented Sept. 1, 1925.

UNITED STATES- ALFRED e. cnIPrs, or INDIANAPOLIS, INDIANA.

sEc'rIoNAL HEATING BOILER.

Application filed June 25, 1923. 'Serial- No. 647,571.

To all whom it ma concern: 4 Be it known t at I, ALFRED G. Cmrrs, residing in the city of Indianapolis, in the county of Marion and State of Indiana, a citizen of the United States, have invented a new and useful Improvement in Sectional Heating Boilers, of which the following is a full, clear, and exact specification, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to sectional heating boilers, and more particularly to sectional heating boilers adapted to burn soft or bituminous coal and to consume most of the smoke and gases which ordinarily pass through the breeching and up the chimney thereby causing great waste of coal .Heretofore devices have been attached to boilers and have been incorporated therein in an attempt to avoid this waste and to burn the gases of combustion which contain a high per cent of the heat units of the coal fed into the combustion chamber and which ordinarily pass up the chimney unburned. However, those devices which did burn even i a small per centof the gases requiredsuch a high degree of, skill in stoking as to preelude their common use. Even when stoked with care and skill the combustion chambers of boilers using these devices contained live coals for only a art of the length of the grate therein, and the rest of the gratewas covered with dead coals or ashes. Hence it can be seen that no matterwhether boilers having these said devices incorporated therein were stoked expertly or not they were either ineffectual in properly burning the gases of combustion or were inefficient or were both ineffectual and inefiicient. The objects of my invention are to pro- Vide a'sectional heating boiler in which low grades of coal will be completely burned without smoke; to provide a sectional heating boiler in which the gases of combustion are burned, thereby utilizing the heat units therein which are ordinarily wasted; and

to provide a sectional heating boiler having horizontal fiues extending longitudinally thereof and having vertical flues extending downwardly from said horizontal flules and being connected .at their lower ends with an air passage extending longitudinally of saidv boiler, and arranged with inlet openings from the combustion chamber thereof, whereby the gases of combustion are mixed with .eilrand a e complet y burned.

, My invention is fully shown in the accompanying drawings wherein similar letters are used to designate similar parts. Fig. l is a rear view of the front section of the boiler; Fig. 2 shows an intermediate section of the boiler; Fig. 3 is a front view ofthe back section of the boiler; Fig. 4 is a cross along the lines 4r-4: ofFigs. 1,, 2 and 3; and Fig. 5 is a cross section of my improved sectional boiler along the lines 55 of Figs. 1, 2 and 3.

Referring to the figures, the sectional boiler comprises the front section A, the intermediate sections B and the back section C. Each intermediate section comprises a body portion having, extending lengthwise .therethrough, two side flues J and two inportion Gis of less thickness -or dimension in the direction of the length of the boiler than the body portion or the water legs. Each of the intermediate sections has formed vsection of my improved sectional boiler on each side of each water leg a channel whose upper end opens into the side flue J and whoselower end opens into the combustion chamber M between the water legs. When the sections are assembled to form a boiler the channels formed in the faces of the water legs D form vertical flues H which extend upwardly from the combustion chamber M to the horizontally extending flue J.

The front section A and the back section C are provided with water spaces E and F as shown in Fig. 4:. The sections are connected to one another near the top ofthe body portion by means of nipples which are placed in the opening a provided therefor and the. sections are also connected to one another by nipples placed in the openas shown in Fig. 5. Circulation of the gases from the side fines J to the intermediate flu'es J takes place through large flue openn UK Jp'ortions the intermediate sections is shown in Fig. 4.

ings provided in the front section as shown in Fig. 1 and which are closed by the doors K as shown in Fig. 5. At the bottom of the combustion cl amber there is placed the usual grate N with the ash pit 0 beneath it. Each intermediate section is provided on each side thereof with an elongated air passage arranged vertically and preferably just inside of the water lcgsD. Each'of these air passages is provided with suitable enclosing walls comprising an inner wall provided with a notch on each side of the water leg close to the crown sheet m and the walls of each of the air passages atthe lower end thereof are also provided with similar notches. hen the sections are assembled to form a boiler the upper notches in adjacent sections register so as'to form the openings Q between the air passages P and the combustion chamber near the top thereof, and the notches in adjacent sections near the bottom of the passages P register to form'the openings R between said air passages P and the combustion chamber-id and the vertical fines H as shown in Figs. 1, 2 and 3. The air passages l? preferablyextend from substantially the crown plate m or the top of'the combustion chamber hi to a point below the median line thereof. I The circulation of the gases through the boileris substantially as follows: Some of the gases of combustion pass from the combustion chamber M directly upward through rtical fines H, but for the most part t emely hot gase s of combustion are in the upper part of the combusl Q e1 teen chamber'in the. pockets fo ed between portions G and escape the overhanging therefrom through the openings Q into the air pas ges P. :lere the hot gases are ized with air which enters through int2 es S which are preferably arranged at front end of the boiler and maintained tl open, The mixture of the, gases 7 ,air' then passes from the air passages P through the openings R into thevcrtical fines H, and from there into the outside horizontal fines J. The gases pass for- 'wardly through the fines J to the front end of the boiler wherethey enter the intermediate flues J through which they pass to the 'breeehingL and from there they pass to the chimney, all as indicated by the arrows in Fig. 5.

rhe vertical fiues H formed by the channels cast on each face of the vertical legs D are clearly shown in Figs. 4 and 5, and the air passages extending from front to rear of the boiler, between the combustion chamber and the water legs 1) are shown in Fig. The thickness of the overhanging G as compared to the thickness of The openings Q and R whereby communication is afforded between the air passages P and the combustion chamber and the vertical flues H are also shown in Fig. l.

Since, as herebefore stated, the mixture of air and gases from the air passages P passes throi'igh the openings R above the point where the vertical flues H enter the combustion chamber M, some part of the mixture may find its way into the combustion chan iber M but, for the most part, all of the mixture will be drawn up the vertical fines whereit is burned by the flames and extremely hot air which enters the fines from the combustion chamber. This burning may continue during the passage up the fines H and into the horizontal flues J and J. The mixture of air and gases in the air passages P is at a'very high temperature since the gas enters the passage through the inlet openings Q directly from the combustion chamber and because of this the mixture is more quicklyand completely burned when it passes intothe flees H. It can be readily seen that virtually all the heat units in the coal fed into the combustion chamber are utilized to make steam since the gases of combustion, which ordinarily pass incompl'etcly burned from the combustion chamshown in 'thedrawings since my invention 'may be adapted to various difierent types of boilers with equal utility.

I 'ill hai t-lc-l'aim asnew and desire to secure by haters Patent, is:

, 1, cast iron sectional boiler comprising a plurality of"'1nter'm'ed1ate sections each having, 'a body portionw'ith a depending leg on each 'side thereof', said body portion hav ng 'fl'ue openings therethrough, each of saidlegs havmga channel formed in the rarand frontfac'e thereof which channels terminate in a flue opening at their upper ends andin the space between said legs at their lower ends, each of said sections having overhanging portion of less thickness than said section adapted to contain water and extending between said water legs, each ,of said wat er legs being pro vided with an 'air p'assage'on the inner side thereof, and each passage having an inner wall with a notch arranged in the upper end thereof on each side of said overhanging portion andeach air passage having'an opening arranged at the lower end thereof on each face of said section so as to connect said air passage wi'tlrsaid channels.

QL' AIcast irons'ectional boiler comprising a' plurality 'of intermediate sections each having a body portion with a depending water leg on each side thereof, said body portion having flue openings therethrough, each of said sections having an overhanging portion of less thickness than said section adapted to contain water and extending between said water legs, each of said water legs being provided with an air passage on the inner side thereof, and each air passage having an inner wall with a notch arranged in the upper end thereof on each side of said overhanging portion and said inner wall also having a notch arranged at the lower end thereof on each face of said section. 1

' 3. A sectional cast iron boiler comprising end and intermediate sections joinedto form an upper body portion and two depending portions arranged one on each side of said body portion to form a combustion chamber therebetween, said body portion having side and intermediate longitudinal flues therein, and said depending portions having vertical flues connecting said side ,fiues with the lower part of said combustion chamber, a wall extending from front to rear on each side of said combustion chamber parallel to said depending portions and connected therewith to form an air passage, said wall having openings therethrough near its upper end to connect the upper part of said combustion chamber with said air passage and having also openings theretl roughnear its lower end whereby said air passage is connected with said vertical fiues.

4;. A sectional cast iron boiler comprising end and intermediate sections joined to form an upper body portion and "two depending portions arranged one on each side of said body portion to form a combustion chamber therebetween, said body portion having side and intermediate longit-udinal flues therein, said boiler having an air passage extending longitudinally thereof on each side of said combustion chamber, and said air passage having inlet openings leading from said combustion chamber near the top thereof and having also outlet openings below the median line of said combustion chamber.

5. A sectional heating boiler comprising joined end and intermediate sections and having a combustion chamber therein, horizontal flues extending longitudinally above the crown plate of said combustion chamber, a plurality of vertical lines extending downwardly from one of said horizontal fiues and terminating in said combustion chamber, and water legs between adjacent vertical lines, said sectional boiler having an air passage with one end thereof open to the atmosphere and arranged longitudinally of said boiler between said combustion chamber and said vertical fiues and provided with inlet openings from said combustion chamber near the top thereof and with outlet openings into said vertical flues near where said vertical fiues connectvwith said combus-' tion; chamber.

6. A sectional heating boiler comprising joined end and intermediate sections and having a combustion chamber therein, horizontal flues extending longitudinally above the crown plate of said combustion chamher, a plurality of vertical flues extending downwardly from one of said horizontal lines and terminating in said combustion chamber, and water legs between adjacent vertical flues, said boiler having an air passage having inlet openings leading from said combustion chamber near the top thereof and having also outlet openings into one of said vertical flues'below the median line of said combustion chamber.

7. A sectional heating boiler comprising joined end and intermediate sections and l'iaving a combustion chamber therein, hori- Zontalside and intermediate flues extending longitudinally of said boiler above said combustion chamber, vertical fiues extending downwardly from said side flues on each side of said combustion chamber and connecting therewith, water spaces between adj acent vertical fiues, overhanging water filled portions extending across the top of said combustion chamber between said water spaces at the sides of said combustion chamber so as to form transverse pockets therein between adjacent overhanging portions, said boiler having an air passage extending horizontally along each side of said combustion chambeig'andsaid air passage having inlet openings from said transverse pockets and having outlet openings into said vertical flues. I

In witness whereof I have signed my name to this specification.

ALFRED, e. GRIPPS. 

